Malicious PDF — malware analysis report

Static analysis result for SHA-256 054cfc7d7bcdfa03…

MALICIOUS

PDF

43.8 KB Created: 2020-08-21 21:46:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05541b86d3d6c37de7c9d1222144bbd2 SHA-1: fd71ca582573f7628809ad7a21256f1fbeb2b6b3 SHA-256: 054cfc7d7bcdfa03355500654f5214d4a48fc6100a49854e4f95b1c794636064
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, and one critical link to a known malicious redirector. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that align with the heuristic findings, suggesting a coordinated effort to drive traffic to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=archer+c7+v3+firmware
    • http://files.sharonmcgregor.com/uploads/1/3/0/7/130740249/6630785.pdf
    • http://files.fisherroadoilsandhoney.com/uploads/1/3/0/7/130740141/da6b829d659.pdf
    • http://files.rtapps.co.uk/uploads/1/3/1/3/131398008/d4309bb6.pdf
    • http://petuti.mayfieldwoodsorchestra.com/uploads/1/3/1/8/131856072/5882853.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6660/5211/files/logoti.pdf
    • https://cdn.shopify.com/s/files/1/0433/8732/2522/files/jeraxaji.pdf
    • https://cdn.shopify.com/s/files/1/0432/2174/5822/files/96696409981.pdf
    • https://cdn.shopify.com/s/files/1/0427/9848/1564/files/ferorotaginawumux.pdf
    • https://cdn.shopify.com/s/files/1/0433/9387/6118/files/vafiwifododurigon.pdf
    • https://cdn.shopify.com/s/files/1/0461/7774/7097/files/chimusebo_by_afunika.pdf
    • https://cdn.shopify.com/s/files/1/0450/5042/9598/files/cbc_blood_test_normal_values_chart.pdf
    • https://cdn.shopify.com/s/files/1/0433/1415/1589/files/dexewezokuget.pdf
    • https://cdn.shopify.com/s/files/1/0430/5233/5255/files/7547883555.pdf
    • https://cdn.shopify.com/s/files/1/0428/3318/2886/files/54488431103.pdf
    • https://cdn.shopify.com/s/files/1/0439/6512/0670/files/relovefobixusise.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fac.bin
86e8dfdec6598a69e0e3da333033ab9a91376ba012eb871f3a799fb756a3ac4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FAC 3796 bytes
font_01_sfnt_off00006d47.bin
79cb00e698623f199fb1e2ff2e14f50cbf0476008f398fcd770f874a61436f3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D47 5296 bytes
font_02_sfnt_off00007f45.bin
a1282804a0a35f914982854005526e8ff08e3995f337325cba8b68f647d74d8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F45 10244 bytes

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